(19)

(11)

EP 2 294 623 A1

(12)

(43) Date of publication: 16.03.2011 Bulletin 2011/11 (21) Application number: 09759608.4 (22) Date of filing: 08.06.2009

(51) International Patent Classification (IPC):  H01L 31/042(2006.01) (86) International application number: PCT/US2009/046606 (87) International publication number: WO 2009/149450 (10.12.2009 Gazette 2009/50)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 07.06.2008 US 131268 P 20.06.2008 US 132550 P (71) Applicant: Hoffman, James Alameda, CA 94501 (US)	(72) Inventor: Hoffman, James Alameda, CA 94501 (US) (74) Representative: Williams, Michael Ian et al Cleveland 40-43 Chancery Lane London WC2A 1JQ London WC2A 1JQ (GB)